问题
解答题
已知:y1=x+3,y2=-x+2,求满足下列条件时x的取值范围:
(1)y1<y2
(2)2y1-y2≤4.
答案
(1)∵y1=x+3,y2=-x+2,
∴x+3<-x+2,解得x<-
;1 2
(2)∵y1=x+3,y2=-x+2,2y1-y2≤4,
∴2(x+3)-(-x+2)≤4,解得x≤0.
已知:y1=x+3,y2=-x+2,求满足下列条件时x的取值范围:
(1)y1<y2
(2)2y1-y2≤4.
(1)∵y1=x+3,y2=-x+2,
∴x+3<-x+2,解得x<-
;1 2
(2)∵y1=x+3,y2=-x+2,2y1-y2≤4,
∴2(x+3)-(-x+2)≤4,解得x≤0.